JPH0738841A - Auxiliary device for teletext recording - Google Patents

Abstract

PURPOSE:To record a teletext data signal and a video signal on the same medium. CONSTITUTION:When the video signal including the teletext data signal is recorded on the recording medium, the teletext data signal is moved or copied to another horizontal line position and sent out. For example, inputted teletext data are temporarily stored in a field memory 15 and when row addresses correspond to 14th, 15th, 16th, and 21st horizontal periods of a TV signal, an address controller 14 changes them into row addresses of 21st, 22nd, 23nd, and 24th horizontal periods. When the row addresses correspond to 22nd, 23rd, and 24th horizontal periods, the field memory 15 is so controlled that the address controller 14 converts them into row addresses of 14th, 15th, and 16th horizontal periods. Consequently, the position of the character broadcast data is shifted to outside a switching section of the head of a VTR, so tha character broadcast data and image data can be recorded on the same medium at the same time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a teletext recording auxiliary device for simultaneously recording teletext data signals and video signals on the same medium.

[0002]

2. Description of the Related Art In teletext, viewers can use their favorite information at any time by repeatedly transmitting various information consisting of characters, figures, and additional sounds, which is different from ordinary TV programs. It is a new broadcasting system made possible.

A teletext signal is multiplexed and transmitted in the form of a digital signal during a part of a vertical blanking period which is a time gap between television image signals. If the receiver prepares a television receiver having a teletext receiver (decoder) built-in and a teletext reception adapter, he / she can select and enjoy his / her teletext program from among many programs.

On the other hand, when recording these teletexts, the teletexts are decoded and converted into TV signals, and then V
Either the data is recorded on the TR or the data is recorded on the hard disk by operating a special board connected to the personal computer.

That is, FIG. 1 shows the former method. When the desired channel is selected from the broadcast waves taken in by the TV tuner 1 via the antenna, the selected broadcast waves are converted into TV signals. It Converted TV
When the teletext data contained in the signal is extracted by the teletext decoder 2, the extracted teletext data is converted into a TV signal and recorded in the VTR 3.

FIG. 2 shows the latter method.
When the desired channel is selected from the broadcast waves taken in by the V tuner 1 via the antenna, the selected broadcast waves are converted into TV signals. The teletext data included in the converted TV signal is extracted by operating the text data extraction board 6 connected to the personal computer 5, and error correction of the teletext data extracted by operating the text data extraction board 6 is performed. After being exposed, it is stored in the hard disk 8. In addition, data processing is performed on the personal computer 5 by the operation of the dedicated software, so that the CRT
It is also possible to display teletext information on 7.

[0007]

However, in the above-mentioned conventional teletext recording system, it is impossible to simultaneously record a teletext data signal and a video signal on the same medium.

That is, in the VTR, one field of a video signal is assigned to one head so that one frame is recorded / reproduced by a pair of two heads, and a head switching portion is provided between the respective heads. Has become.

On the other hand, the teletext data included in the teletext includes 14, 15, and 15 in the vertical blanking period of the video signal.
Since it is overlapped with 16 and 21H, and there is a large possibility that the teletext data will be lost during this period since it is applied to the switching portion of the head of the VTR, the teletext data signal and the video signal are simultaneously recorded on the same medium. Is impossible.

The present invention has been made in view of such circumstances, and an object thereof is to provide a teletext recording auxiliary device capable of simultaneously recording a teletext data signal and a video signal on the same medium. To do.

[0011]

In order to achieve the above object, the present invention provides a teletext recording auxiliary device for assisting recording when a video signal including a teletext data signal is recorded on a recording medium. When the video signal including the broadcast data signal is recorded on the recording medium, the teletext data signal is moved or copied to another horizontal line position and transmitted.

[0012]

In the teletext recording auxiliary device of the present invention, when the video signal including the teletext data signal is recorded on the recording medium,
The teletext data signal is configured to be moved or copied to another horizontal line position and transmitted. For example, the input teletext data is temporarily stored in a memory and inserted into H other than the head switching section. By shifting the insertion position of teletext data, the teletext data can be assigned to the head.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the drawings described below, the same parts as those in FIG. 1 are designated by the same reference numerals, and the overlapping description will be omitted.

FIG. 3 shows an embodiment of the teletext recording auxiliary device of the present invention. The broadcast wave output tuned by the TV tuner 1 is sent to a buffer 9 and a burst extraction circuit 10 to burst. The output of the extraction circuit 10 is sent to the PLL 11. The output of the PLL 11 is the system clock, and the A / D converter 18, the additional information discriminating circuit 20, the sync separator 12, the reset pulse creating circuit 13, the address controller 14, the system controller 16, the field memory 15, the information adding circuit 17, D.
It is output to the / A converter 19. The output of the buffer 9 is A
It is sent to the / D converter 18, the field memory 15, the additional information discriminating circuit 20, and the sync separator 12.

The output of the field memory 15 is passed through an information adding circuit 17 and a D / A converter 19 and then a waveform shaping circuit 22.
Sent to. The output of the sync separator 12 is sent to the reset pulse creating circuit 13, and the output of the reset pulse creating circuit 13 is sent to the address controller 14. The outputs of the system controller 16 and the signal generator 21 are sent to the address controller 14. The output of the additional information discrimination circuit 20 is sent to the system controller 16.

Next, a method of recording teletext data by the teletext recording auxiliary device having such a configuration will be described.

The broadcast wave via the antenna selected by the TV tuner 1 is sent to the A / D converter 18 via the buffer 9 and converted into a digital signal. At the same time, the burst included in the TV signal is extracted by the burst extraction circuit 10 and then sent to the PLL 11. The PLL 11 generates a system clock having a frequency four times that of the subcarrier (burst) whose phase is locked to the extracted burst, and then uses this system clock as the A / D converter 18, the additional information discriminating circuit 20, and the sync separator 12. , Reset pulse creation circuit 13, address controller 14, system controller 16, field memory 15, information addition circuit 17, D / A converter 19
To control the operation timing of each component.

On the other hand, when the TV signal digitized by the A / D converter 18 is sent to the sync separator 12, the sync separator 12 generates an H sync and a V sync, and the H sync (H HD (HD) ) Is generated from the V sync and V drive (VD) is generated, and is output to the reset pulse generation circuit 13. The reset pulse generation circuit 13 outputs a reference control signal for controlling the address of the field memory 15 to the address controller 14 based on these HD and VD.

That is, the matrix of write addresses is reset to 0 by the H reset pulse (HRP) and the V reset pulse (VRP), and the column becomes 0 by the H reset pulse.
And the row address is incremented by one. The column address is incremented by 1 at the system clock.

Here, the row address is 14, 1 of the TV signal.
When it corresponds to the 5th, 16th, and 21th H, the address controller 14 changes the row addresses to 21, 22, 23, and 24H, respectively, and the row addresses are 22, 23, and 24H.
When it corresponds to the Hth, the field memory 15 is controlled such that the address controller 14 converts the row address into 14, 15 and 16H row addresses, respectively.

That is, in this example, the row address 1
The form in which the row addresses of 4, 15, 16, 21H are changed to 21, 22, 23, 24H will be described.

On the other hand, when the data is read from the field memory 15, it is performed based on the reference signal from the signal generator 21. That is, the signal generator 21 generates a reference signal for reading data from the field memory 15, and sends a signal (read H reset pulse and read V to the address controller 14).
When the reset pulse) is transmitted, the read address is reset and the read control of the field memory 15 is performed.

The data read from the field memory 15 is processed by the information adding circuit 17 to obtain the original line information (14,
(15, 16, 21H), converted into an analog signal by the D / A converter 19, further waveform-shaped by the waveform shaping circuit 22 and output as a recording signal to the VTR.

Here, when the character information reproduced by the VTR is displayed by a CRT or the like, the signals reproduced by the VTR include character information of 14, 15, 16, 21H in 21, 22, 23, 24H, respectively. Therefore, by performing the inverse conversion on the field memory 15, it is restored to a signal in which the teletext decoder 2 shown in FIG. 1 operates,
You can see.

Further, by inserting the waveform shaping circuit 22 in the output, the influence of the radio wave transmission system VTR can be suppressed, but by applying the waveform shaping only to the character data, the optimum waveform shaping can be performed on the data without affecting the image. become.

As described above, in this embodiment, the position of the teletext data is shifted so as to be out of the switching section of the head of the VTR, so that the teletext data and the video can be simultaneously recorded on the same medium.

Further, since the position is shifted, the position is closer to the effective screen, but the influence on the image can be reduced by lowering the data level.

Further, since the original position data is added, the VTR
The position can be changed freely even if there are individual differences for each species. In this embodiment, the row address is 1 for the TV signal.
When corresponding to the 4th, 15th, 16th, and 21st H, the address controller 14 sets 21, 22, 23, and 24H respectively.
Although the case where the line address is changed to the line address has been described, the present invention is not limited to this example, and may be changed to another line address.

[0029]

As described above, according to the teletext recording auxiliary device of the present invention, when the video signal including the teletext data signal is recorded on the recording medium, the teletext data signal is transmitted to another horizontal line position. It is configured to be moved or copied to and sent out. For example, by storing the input teletext data once in the memory, inserting it in H other than the head switching section, and shifting the insertion position of the teletext data. Since the teletext data is assigned to the head, the teletext data signal and the video signal can be simultaneously recorded on the same medium.

[Brief description of drawings]

FIG. 1 is a block diagram showing a method of decoding a conventional teletext and converting it into a TV signal and then recording the TV signal on a VTR.

FIG. 2 is a block diagram showing a method of recording data on a hard disk by connecting a conventional special board to a personal computer.

FIG. 3 is a block diagram showing an embodiment of a teletext recording auxiliary device of the present invention.

FIG. 4 is a diagram for explaining a rearrangement state of character data in the teletext recording auxiliary device of FIG.

[Explanation of symbols]

 1 TV Tuner 9 Buffer 10 Burst Extraction Circuit 11 PLL 12 Sync Separator 13 Reset Pulse Creating Circuit 14 Address Controller 15 Field Memory 16 System Controller 17 Information Addition Circuit 18 A / D Converter 19 D / A Converter 20 Additional Information Discrimination Circuit 21 Signal generator 22 Wave shaping circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H04N 7/03 7/035

Claims (1)

[Claims] 1. A teletext recording auxiliary device for assisting recording when a video signal including a teletext data signal is recorded on a recording medium, wherein the video signal including the teletext data signal is recorded on a recording medium. A teletext data recording device, characterized in that the teletext data signal is moved or copied to another horizontal line position and transmitted.